Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Qual instrumento tem chven-s como advérbio?
 ###Tabelas: CREATE TABLE jersey_progression (jersey_progression_id AUTO_INCREMENT PRIMARY KEY, Stage INT, Winner VARCHAR, General classification VARCHAR, Points classification VARCHAR, Mountains classification VARCHAR, Sprints classification VARCHAR, Team classification VARCHAR) CREATE TABLE nsl_cup_winners (nsl_cup_winners_id AUTO_INCREMENT PRIMARY KEY, Season VARCHAR, Cup FinalDate VARCHAR, WinningTeam VARCHAR, Score VARCHAR, LosingTeam VARCHAR, Location VARCHAR, Cup Final Attendance INT) CREATE TABLE possessive_adjectives (possessive_adjectives_id AUTO_INCREMENT PRIMARY KEY, Nominative VARCHAR, Ergative VARCHAR, Dative VARCHAR, Genitive VARCHAR, Instrumental VARCHAR, Adverbial VARCHAR) CREATE TABLE list_of_african_countries_by_gdp_per_capita (list_of_african_countries_by_gdp_per_capita_id AUTO_INCREMENT PRIMARY KEY, GDP (PPP) per capita 2010; African/World rank 2010; VARCHAR, Nation VARCHAR, GDP by agriculture 2010 VARCHAR, GDP by industry 2010 VARCHAR, GDP by services 2010 VARCHAR, Total GDP (PPP) 2010; African/World rank 2010; VARCHAR, GDP real growth rate 2010 VARCHAR) CREATE TABLE ippt_standards (ippt_standards_id AUTO_INCREMENT PRIMARY KEY, Grade VARCHAR, Points INT, Sit-up (reps) VARCHAR, Standing Broad Jump (cm) VARCHAR, Chin-up (reps) VARCHAR, Shuttle Run (sec) VARCHAR, 2.4km Run (min:sec) VARCHAR)  
SELECT Instrumental FROM possessive_adjectives WHERE Adverbial = chven-s